[SANOG] Weekly Global IPv4 Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri Oct 22 18:03:04 UTC 2021


This is an automated weekly mailing describing the state of the Internet
Global IPv4 Routing Table as seen from APNIC's router in Japan.

The posting is sent to APOPS, NANOG, AfNOG, SANOG, PacNOG, SAFNOG
TZNOG, MENOG, BJNOG, SDNOG, CMNOG, LACNOG and the RIPE Routing WG.

Daily listings are sent to bgp-stats at lists.apnic.net

For historical data, please see http://thyme.rand.apnic.net.

If you have any comments please contact Philip Smith <pfsinoz at gmail.com>.

Global IPv4 Routing Table Report   04:00 +10GMT Sat 23 Oct, 2021

Report Website:     http://thyme.rand.apnic.net
Detailed Analysis:  http://thyme.rand.apnic.net/current/

Analysis Summary
----------------

BGP routing table entries examined:                              867554
    Prefixes after maximum aggregation (per Origin AS):          329940
    Deaggregation factor:                                          2.63
    Unique aggregates announced (without unneeded subnets):      419703
Total ASes present in the Internet Routing Table:                 72150
    Prefixes per ASN:                                             12.02
Origin-only ASes present in the Internet Routing Table:           61971
Origin ASes announcing only one prefix:                           25553
Transit ASes present in the Internet Routing Table:               10179
Transit-only ASes present in the Internet Routing Table:            348
Average AS path length visible in the Internet Routing Table:       4.4
    Max AS path length visible:                                      53
    Max AS path prepend of ASN (265020)                              50
Prefixes from unregistered ASNs in the Routing Table:               920
    Number of instances of unregistered ASNs:                       924
Number of 32-bit ASNs allocated by the RIRs:                      37600
Number of 32-bit ASNs visible in the Routing Table:               31219
Prefixes from 32-bit ASNs in the Routing Table:                  145632
Number of bogon 32-bit ASNs visible in the Routing Table:            22
Special use prefixes present in the Routing Table:                    1
Prefixes being announced from unallocated address space:            417
Number of addresses announced to Internet:                   3071270144
    Equivalent to 183 /8s, 15 /16s and 221 /24s
    Percentage of available address space announced:               83.0
    Percentage of allocated address space announced:               83.0
    Percentage of available address space allocated:              100.0
    Percentage of address space in use by end-sites:               99.5
Total number of prefixes smaller than registry allocations:      288266

APNIC Region Analysis Summary
-----------------------------

Prefixes being announced by APNIC Region ASes:                   231716
    Total APNIC prefixes after maximum aggregation:               66510
    APNIC Deaggregation factor:                                    3.48
Prefixes being announced from the APNIC address blocks:          227141
    Unique aggregates announced from the APNIC address blocks:    92521
APNIC Region origin ASes present in the Internet Routing Table:   12039
    APNIC Prefixes per ASN:                                       18.87
APNIC Region origin ASes announcing only one prefix:               3422
APNIC Region transit ASes present in the Internet Routing Table:   1700
Average APNIC Region AS path length visible:                        4.6
    Max APNIC Region AS path length visible:                         37
Number of APNIC region 32-bit ASNs visible in the Routing Table:   7211
Number of APNIC addresses announced to Internet:              773052288
    Equivalent to 46 /8s, 19 /16s and 215 /24s
APNIC AS Blocks        4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations)  23552-24575, 37888-38911, 45056-46079, 55296-56319,
                       58368-59391, 63488-64098, 64297-64395, 131072-151865
APNIC Address Blocks     1/8,  14/8,  27/8,  36/8,  39/8,  42/8,  43/8,
                        49/8,  58/8,  59/8,  60/8,  61/8, 101/8, 103/8,
                       106/8, 110/8, 111/8, 112/8, 113/8, 114/8, 115/8,
                       116/8, 117/8, 118/8, 119/8, 120/8, 121/8, 122/8,
                       123/8, 124/8, 125/8, 126/8, 133/8, 150/8, 153/8,
                       163/8, 171/8, 175/8, 180/8, 182/8, 183/8, 202/8,
                       203/8, 210/8, 211/8, 218/8, 219/8, 220/8, 221/8,
                       222/8, 223/8,

ARIN Region Analysis Summary
----------------------------

Prefixes being announced by ARIN Region ASes:                    254633
    Total ARIN prefixes after maximum aggregation:               117512
    ARIN Deaggregation factor:                                     2.17
Prefixes being announced from the ARIN address blocks:           254543
    Unique aggregates announced from the ARIN address blocks:    122065
ARIN Region origin ASes present in the Internet Routing Table:    18927
    ARIN Prefixes per ASN:                                        13.45
ARIN Region origin ASes announcing only one prefix:                6857
ARIN Region transit ASes present in the Internet Routing Table:    1949
Average ARIN Region AS path length visible:                         3.8
    Max ARIN Region AS path length visible:                          28
Number of ARIN region 32-bit ASNs visible in the Routing Table:    4171
Number of ARIN addresses announced to Internet:              1301368320
    Equivalent to 77 /8s, 145 /16s and 78 /24s
ARIN AS Blocks         1-1876, 1902-2042, 2044-2046, 2048-2106
(pre-ERX allocations)  2138-2584, 2615-2772, 2823-2829, 2880-3153
                       3354-4607, 4865-5119, 5632-6655, 6912-7466
                       7723-8191, 10240-12287, 13312-15359, 16384-17407
                       18432-20479, 21504-23551, 25600-26591,
                       26624-27647, 29696-30719, 31744-33791
                       35840-36863, 39936-40959, 46080-47103
                       53248-55295, 62464-63487, 64198-64296, 393216-401308
ARIN Address Blocks      3/8,   4/8,   6/8,   7/8,   8/8,   9/8,  11/8,
                        12/8,  13/8,  15/8,  16/8,  17/8,  18/8,  19/8,
                        20/8,  21/8,  22/8,  23/8,  24/8,  26/8,  28/8,
                        29/8,  30/8,  32/8,  33/8,  34/8,  35/8,  38/8,
                        40/8,  44/8,  47/8,  48/8,  50/8,  52/8,  53/8,
                        54/8,  55/8,  56/8,  57/8,  63/8,  64/8,  65/8,
                        66/8,  67/8,  68/8,  69/8,  70/8,  71/8,  72/8,
                        73/8,  74/8,  75/8,  76/8,  96/8,  97/8,  98/8,
                        99/8, 100/8, 104/8, 107/8, 108/8, 128/8, 129/8,
                       130/8, 131/8, 132/8, 134/8, 135/8, 136/8, 137/8,
                       138/8, 139/8, 140/8, 142/8, 143/8, 144/8, 146/8,
                       147/8, 148/8, 149/8, 152/8, 155/8, 156/8, 157/8,
                       158/8, 159/8, 160/8, 161/8, 162/8, 164/8, 165/8,
                       166/8, 167/8, 168/8, 169/8, 170/8, 172/8, 173/8,
                       174/8, 184/8, 192/8, 198/8, 199/8, 204/8, 205/8,
                       206/8, 207/8, 208/8, 209/8, 214/8, 215/8, 216/8,
                      

RIPE Region Analysis Summary
----------------------------

Prefixes being announced by RIPE Region ASes:                    241557
    Total RIPE prefixes after maximum aggregation:               113212
    RIPE Deaggregation factor:                                     2.13
Prefixes being announced from the RIPE address blocks:           237828
    Unique aggregates announced from the RIPE address blocks:    146133
RIPE Region origin ASes present in the Internet Routing Table:    28094
    RIPE Prefixes per ASN:                                         8.47
RIPE Region origin ASes announcing only one prefix:               12107
RIPE Region transit ASes present in the Internet Routing Table:    3918
Average RIPE Region AS path length visible:                         4.4
    Max RIPE Region AS path length visible:                          27
Number of RIPE region 32-bit ASNs visible in the Routing Table:   10484
Number of RIPE addresses announced to Internet:               712184704
    Equivalent to 42 /8s, 115 /16s and 19 /24s
RIPE AS Blocks         1877-1901, 2043, 2047, 2107-2136, 2585-2614
(pre-ERX allocations)  2773-2822, 2830-2879, 3154-3353, 5377-5631
                       6656-6911, 8192-9215, 12288-13311, 15360-16383
                       20480-21503, 24576-25599, 28672-29695
                       30720-31743, 33792-35839, 38912-39935
                       40960-45055, 47104-52223, 56320-58367
                       59392-61439, 61952-62463, 64396-64495
                       196608-213403
RIPE Address Blocks      2/8,   5/8,  25/8,  31/8,  37/8,  46/8,  51/8,
                        62/8,  77/8,  78/8,  79/8,  80/8,  81/8,  82/8,
                        83/8,  84/8,  85/8,  86/8,  87/8,  88/8,  89/8,
                        90/8,  91/8,  92/8,  93/8,  94/8,  95/8, 109/8,
                       141/8, 145/8, 151/8, 176/8, 178/8, 185/8, 188/8,
                       193/8, 194/8, 195/8, 212/8, 213/8, 217/8,

LACNIC Region Analysis Summary
------------------------------

Prefixes being announced by LACNIC Region ASes:                  112033
    Total LACNIC prefixes after maximum aggregation:              26788
    LACNIC Deaggregation factor:                                   4.18
Prefixes being announced from the LACNIC address blocks:         112908
    Unique aggregates announced from the LACNIC address blocks:   47478
LACNIC Region origin ASes present in the Internet Routing Table:  10786
    LACNIC Prefixes per ASN:                                      10.47
LACNIC Region origin ASes announcing only one prefix:              2614
LACNIC Region transit ASes present in the Internet Routing Table:  2119
Average LACNIC Region AS path length visible:                       4.9
    Max LACNIC Region AS path length visible:                        53
Number of LACNIC region 32-bit ASNs visible in the Routing Table:  8455
Number of LACNIC addresses announced to Internet:             176483328
    Equivalent to 10 /8s, 132 /16s and 236 /24s
LACNIC AS Blocks       26592-26623, 27648-28671, 52224-53247,
                       61440-61951, 64099-64197, 262144-272796 + ERX transfers
LACNIC Address Blocks  177/8, 179/8, 181/8, 186/8, 187/8, 189/8, 190/8,
                       191/8, 200/8, 201/8,

AfriNIC Region Analysis Summary
-------------------------------

Prefixes being announced by AfriNIC Region ASes:                  26695
    Total AfriNIC prefixes after maximum aggregation:              5223
    AfriNIC Deaggregation factor:                                  5.11
Prefixes being announced from the AfriNIC address blocks:         34717
    Unique aggregates announced from the AfriNIC address blocks:  11144
AfriNIC Region origin ASes present in the Internet Routing Table:  1569
    AfriNIC Prefixes per ASN:                                     22.13
AfriNIC Region origin ASes announcing only one prefix:              553
AfriNIC Region transit ASes present in the Internet Routing Table:  311
Average AfriNIC Region AS path length visible:                      5.1
    Max AfriNIC Region AS path length visible:                       42
Number of AfriNIC region 32-bit ASNs visible in the Routing Table:  898
Number of AfriNIC addresses announced to Internet:            107911424
    Equivalent to 6 /8s, 110 /16s and 153 /24s
AfriNIC AS Blocks      36864-37887, 327680-329727 & ERX transfers
AfriNIC Address Blocks  41/8,  45/8, 102/8, 105/8, 154/8, 196/8, 197/8,
                      

APNIC Region per AS prefix count summary
----------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
  9808        8188       9000      57  CMNET-GD Guangdong Mobile Communication
  7545        5839        787     682  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4661       4192      74  ERX-CERNET-BKB China Education and Rese
  7713        3507       1023      57  TELKOMNET-AS-AP PT Telekomunikasi Indon
 45899        3056       1896      55  VNPT-AS-VN VNPT Corp, VN
  7552        2969       1330      19  VIETEL-AS-AP Viettel Group, VN
  4766        2507      11119     578  KIXS-AS-KR Korea Telecom, KR
  9498        2163        472     237  BBIL-AP BHARTI Airtel Ltd., IN
  4755        2126        429     203  TATACOMM-AS TATA Communications formerl
 45090        2126       1198      75  CNNIC-TENCENT-NET-AP Shenzhen Tencent C

Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-APNIC

ARIN Region per AS prefix count summary
---------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
 16509        5766       9981    2525  AMAZON-02, US
 11492        4672        309     782  CABLEONE, US
 22773        4085       3057     378  ASN-CXA-ALL-CCI-22773-RDC, US
  7155        3951        264      30  VIASAT-SP-BACKBONE, US
 16625        3638       1882    2536  AKAMAI-AS, US
  6327        3371       1318      69  SHAW, CA
   749        2666      50722    1922  DNIC-AS-00749, US
 30036        2584        373     195  MEDIACOM-ENTERPRISE-BUSINESS, US
   209        2527       5028     447  CENTURYLINK-US-LEGACY-QWEST, US
 20115        2241       3032     504  CHARTER-20115, US

Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-ARIN

RIPE Region per AS prefix count summary
---------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
 12479        6861       1726     143  UNI2-AS, ES
 20940        3892       3348     214  AKAMAI-ASN1, NL
 39891        3271        187      23  ALJAWWALSTC-AS, SA
  8551        3270        378      39  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 12389        2929       2283     898  ROSTELECOM-AS, RU
  9009        2508        259    1323  M247, GB
 34984        2241        358     603  TELLCOM-AS, TR
 58224        1692        902     581  TCI, IR
 61317        1665        223     927  ASDETUK www.heficed.com, GB
 13188        1606        100      27  TRIOLAN, UA

Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-RIPE

LACNIC Region per AS prefix count summary
-----------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
  8151        8902       3461     572  Uninet S.A. de C.V., MX
 10620        3413        519     716  Telmex Colombia S.A., CO
 11830        2498        369      62  Instituto Costarricense de Electricidad
 13999        1641        297     457  Mega Cable, S.A. de C.V., MX
  6503        1523        359     473  Axtel, S.A.B. de C.V., MX
 28573        1444       2309     253  CLARO S.A., BR
  3816        1240        651     153  COLOMBIA TELECOMUNICACIONES S.A. ESP, C
 26615        1126       2351     135  TIM SA, BR
  6147        1083        369      22  Telefonica del Peru S.A.A., PE
 11172         956        111      69  Alestra, S. de R.L. de C.V., MX

Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-LACNIC

AfriNIC Region per AS prefix count summary
------------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
 24863        1636        393      21  LINKdotNET-AS, EG
 24835        1551        503      32  RAYA-AS, EG
 36992        1287       1418     270  ETISALAT-MISR, EG
 36903        1183        537     110  MT-MPLS, MA
 29571         813         68      11  ORANGE-COTE-IVOIRE, CI
 36935         643        523      44  Vodafone-, EG
  6713         611       1863      34  IAM-AS, MA
 15399         514         50      31  WANANCHI-, KE
 37342         470         32       1  MOVITEL, MZ
  2018         343        319      73  TENET-1, ZA

Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-AFRINIC

Global Per AS prefix count summary
----------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
  8151        8902       3461     572  Uninet S.A. de C.V., MX
  9808        8188       9000      57  CMNET-GD Guangdong Mobile Communication
 12479        6861       1726     143  UNI2-AS, ES
  7545        5839        787     682  TPG-INTERNET-AP TPG Telecom Limited, AU
 16509        5766       9981    2525  AMAZON-02, US
 11492        4672        309     782  CABLEONE, US
  4538        4661       4192      74  ERX-CERNET-BKB China Education and Rese
 22773        4085       3057     378  ASN-CXA-ALL-CCI-22773-RDC, US
  7155        3951        264      30  VIASAT-SP-BACKBONE, US
 20940        3892       3348     214  AKAMAI-ASN1, NL

Complete listing at http://thyme.rand.apnic.net/current/data-ASnet

Global Per AS Maximum Aggregation summary
-----------------------------------------

   ASN  No of nets  Net Savings  Description
  9808        8188         8131  CMNET-GD Guangdong Mobile Communication Co.Ltd.
 12479        6861         6718  UNI2-AS, ES
  7545        5839         5157  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4661         4587  ERX-CERNET-BKB China Education and Research Net
  7155        3951         3921  VIASAT-SP-BACKBONE, US
 11492        4672         3890  CABLEONE, US
 22773        4085         3707  ASN-CXA-ALL-CCI-22773-RDC, US
 20940        3892         3678  AKAMAI-ASN1, NL
  7713        3507         3450  TELKOMNET-AS-AP PT Telekomunikasi Indonesia, ID
  6327        3371         3302  SHAW, CA

Complete listing at http://thyme.rand.apnic.net/current/data-CIDRnet

List of Unregistered Origin ASNs (Global)
-----------------------------------------

    Bad AS  Designation  Net Originated      Transit AS  Transit AS Name
    398418  UNALLOCATED  8.2.200.0/24              2914  NTT-COMMUNICATIONS-2914, US
     46990  UNALLOCATED  8.5.242.0/23              3356  LEVEL3, US
     62828  UNALLOCATED  8.21.130.0/24             3356  LEVEL3, US
    393266  UNALLOCATED  8.23.52.0/24             46887  LIGHTOWER, US
     18604  UNALLOCATED  8.25.204.0/24             3356  LEVEL3, US
    394936  UNALLOCATED  8.33.224.0/24              174  COGENT-174, US
     54338  UNALLOCATED  8.33.241.0/24             6461  ZAYO-6461, US
     23061  UNALLOCATED  8.39.119.0/24             3356  LEVEL3, US
      1782  UNALLOCATED  8.42.19.0/24             46887  LIGHTOWER, US
    395438  UNALLOCATED  8.42.206.0/24             3356  LEVEL3, US

Complete listing at http://thyme.rand.apnic.net/current/data-badAS

Prefixes from private and non-routed address space (Global)
-----------------------------------------------------------

Prefix                Origin AS  Description
192.88.99.0/24             6939  HURRICANE, US

Complete listing at http://thyme.rand.apnic.net/current/data-dsua

Advertised Unallocated Addresses
--------------------------------

Unassigned Network     ASN Information  AS Name
23.132.208.0/24      Origin:      7850  CITYLINKFIBER, US
23.132.208.0/24     Transit:     15164  UPNLLC, US
23.141.0.0/24        Origin:    395350  UNASSIGNED
23.141.0.0/24       Transit:     11426  TWC-11426-CAROLINAS, US
27.100.7.0/24        Origin:     56096  UNASSIGNED
27.100.7.0/24       Transit:     45455  TH-2S1N-AP Two S One N Co Ltd, Internet 
41.57.124.0/22       Origin:     37442  UNASSIGNED
41.57.124.0/22      Transit:       174  COGENT-174, US
41.57.124.0/23       Origin:     37442  UNASSIGNED
41.57.124.0/23      Transit:     37204  TELONE, ZW

Complete listing at http://thyme.rand.apnic.net/current/data-add-IANA

Number of prefixes announced per prefix length (Global)
-------------------------------------------------------

 /1:0        /2:0        /3:0        /4:0        /5:0        /6:0       
 /7:0        /8:16       /9:13      /10:41      /11:99      /12:300     
/13:596     /14:1214    /15:2045    /16:13601   /17:8330    /18:14072   
/19:25507   /20:42973   /21:50849   /22:107093  /23:93296   /24:506056  
/25:1453    /26:0       /27:0       /28:0       /29:0       /30:0       
/31:0       /32:0       

Advertised prefixes smaller than registry allocations
-----------------------------------------------------

   ASN  No of nets  Total ann.  Description
 12479        5822        6861  UNI2-AS, ES
 11492        3611        4672  CABLEONE, US
  8151        3290        8902  Uninet S.A. de C.V., MX
  6327        3179        3371  SHAW, CA
  7155        3041        3951  VIASAT-SP-BACKBONE, US
 22773        3014        4085  ASN-CXA-ALL-CCI-22773-RDC, US
 39891        2807        3271  ALJAWWALSTC-AS, SA
  8551        2735        3270  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
 30036        2238        2584  MEDIACOM-ENTERPRISE-BUSINESS, US
 11830        1931        2498  Instituto Costarricense de Electricidad y Telec

Complete listing at http://thyme.rand.apnic.net/current/data-sXXas-nos

Number of /24s announced per /8 block (Global)
----------------------------------------------

   1:1921      2:1051      3:145       4:19        5:3658      6:85     
   7:5         8:1552      9:1        11:172      12:1715     13:400    
  14:2291     15:118      16:24       17:372      18:121      20:126    
  21:4        22:188      23:5235     24:2415     25:2        27:2517   
  29:19       31:2365     32:106      34:1        35:47       36:1730   
  37:3906     38:2322     39:608      40:151      41:3868     42:1039   
  43:2064     44:290      45:15532    46:3655     47:320      48:1      
  49:1674     50:1839     51:100      52:1294     54:279      55:735    
  56:4        57:55       58:1747     59:1177     60:932      61:2336   
  62:2317     63:1959     64:5370     65:2359     66:4929     67:2864   
  68:1165     69:4112     70:1355     71:678      72:3160     74:2627   
  75:1495     76:698      77:2042     78:1735     79:2569     80:1855   
  81:1515     82:1354     83:1165     84:1292     85:2823     86:716    
  87:1867     88:980      89:3067     90:505      91:7417     92:1834   
  93:2565     94:3132     95:3563     96:1297     97:347      98:977    
  99:953     100:75      101:1039    102:1724    103:27215   104:4052   
 105:436     106:804     107:2385    108:733     109:3915    110:2042   
 111:3122    112:1956    113:1406    114:1504    115:1937    116:1889   
 117:2344    118:2327    119:1884    120:1592    121:1088    122:2537   
 123:2166    124:1596    125:2049    128:1400    129:1159    130:903    
 131:2062    132:743     133:364     134:1889    135:319     136:787    
 137:858     138:2410    139:1202    140:833     141:1290    142:1197   
 143:1380    144:1274    145:326     146:1564    147:1466    148:2218   
 149:1500    150:834     151:1089    152:1660    153:434     154:3141   
 155:1370    156:1766    157:1188    158:995     159:2041    160:2345   
 161:1246    162:3351    163:1105    164:1649    165:1461    166:593    
 167:1661    168:3650    169:688     170:4334    171:783     172:2763   
 173:2975    174:1003    175:1124    176:3349    177:4544    178:2999   
 179:1922    180:2256    181:2688    182:3121    183:2013    184:2413   
 185:18952   186:4208    187:3206    188:3459    189:2910    190:8651   
 191:1313    192:10851   193:8401    194:6842    195:4874    196:2880   
 197:2165    198:6036    199:5924    200:7361    201:5491    202:10489  
 203:10031   204:4517    205:3380    206:3799    207:3369    208:3999   
 209:4738    210:4200    211:2429    212:3756    213:3382    214:1167   
 215:62      216:6370    217:2619    218:1224    219:648     220:1949   
 221:976     222:844     223:2078   

End of report


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